CN120503473A

CN120503473A - Laminated glass

Info

Publication number: CN120503473A
Application number: CN202510171163.4A
Authority: CN
Inventors: 光武秀雄; 青木时彦; 安川实; 井上贵文
Original assignee: Asahi Glass Co Ltd
Current assignee: AGC Inc
Priority date: 2024-02-19
Filing date: 2025-02-17
Publication date: 2025-08-19

Abstract

The present invention improves the appearance of a mark on a laminated glass having a scattering portion serving as the mark. The laminated glass is provided with a first glass plate, a second glass plate, and an interlayer film that is positioned between the first glass plate and the second glass plate and bonds the first glass plate and the second glass plate, and further comprises an optical reflection layer that reflects light incident from the first glass plate side, a shielding layer that is disposed closer to the second glass plate side than the optical reflection layer in a cross-sectional view and at least partially overlaps the optical reflection layer in a plan view, and a scattering portion that is positioned at a position overlapping a region where the optical reflection layer is disposed in a plan view.

Description

Laminated glass

Technical Field

The present invention relates to laminated glass.

Background

A surface of a glass plate used for an automobile or the like is sometimes formed with a mark such as a model number. Such a mark is formed, for example, by preparing a blasting device having a nozzle capable of discharging a compressed fluid containing sand, and spraying the compressed fluid from the nozzle of the blasting device onto the surface of the glass sheet to roughen the surface of the glass sheet.

Prior art literature

Patent literature

Patent document 1 Japanese patent application laid-open No. 2018-193258

Disclosure of Invention

Technical problem to be solved by the invention

However, the conventional marks have room for improvement in terms of appearance.

The present invention has been made in view of the above-described problems, and an object of the present invention is to improve the appearance of a mark on a laminated glass having a scattering portion serving as the mark.

Means for solving the technical problems

The laminated glass according to one embodiment of the present disclosure is a laminated glass including a first glass plate, a second glass plate, and an interlayer film that is positioned between the first glass plate and the second glass plate and bonds the first glass plate and the second glass plate, wherein the laminated glass includes an optical reflection layer that reflects light incident from the first glass plate side, a shielding layer that is disposed closer to the second glass plate side than the optical reflection layer in a cross-sectional view and at least a part of which overlaps the optical reflection layer in a plan view, and a scattering portion that is positioned at a position overlapping a region where the optical reflection layer is disposed in a plan view.

Effects of the invention

According to one embodiment of the present disclosure, the appearance of the mark can be improved for a laminated glass having a scattering portion serving as the mark.

Drawings

Fig. 1 is a schematic diagram showing a HUD system of a first embodiment.

Fig. 2 is a diagram illustrating a laminated glass according to the first embodiment.

Fig. 3 is a partially enlarged plan view of the scattering portion and its vicinity shown in fig. 2 (a).

Fig. 4 is a cross-sectional view illustrating a laminated glass according to modification 1 of the first embodiment.

Fig. 5 is a cross-sectional view illustrating a laminated glass according to modification 2 of the first embodiment.

Fig. 6 is a cross-sectional view illustrating a laminated glass according to modification 3 of the first embodiment.

Detailed Description

Embodiments for carrying out the invention are described below with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals, and overlapping description of the same components may be omitted. In addition, in the drawings, the size or shape of the portions may be exaggerated for the convenience of understanding of the present invention.

In addition, a vehicle is typically an automobile, but also a moving body on which laminated glass can be mounted, including an electric car, a ship, an airplane, and the like.

The plane view means that the object is viewed from a normal direction passing through the center of gravity of the principal surface of the object, and the shape seen at this time is referred to as a planar shape.

In addition, the expressions "upper" and "lower" refer to upper and lower when the laminated glass is mounted on a vehicle.

The outermost peripheral edge of the predetermined member is referred to as a "peripheral edge", and a region of the predetermined member inscribed in the "peripheral edge" and having a width is referred to as a "peripheral edge portion".

< First embodiment >

[ HUD System ]

Fig. 1 is a schematic diagram showing a HUD system of a first embodiment. The HUD system 1 shown in fig. 1 includes a laminated glass 10, a light source 50, a first optical system 60, an image display element 70, a second optical system 80, and a concave mirror 90. The HUD system 1 is a head-up display system for a vehicle that displays a virtual image on the vehicle outside of the laminated glass 10. In addition, in the HUD system 1, the first optical system 60 and the second optical system 80 may be provided as necessary.

The laminated glass 10 is, for example, a windshield for a vehicle, and visible light of P polarized light enters from the inside of the vehicle. The laminated glass 10 includes an optical reflection layer 14 in a region where visible light of P-polarized light reflected by the concave mirror 90 is incident. The optical reflection layer 14 may be formed at least in the region irradiated with P-polarized light from the light source 50, or may be formed on the entire surface of the laminated glass 10.

The light source 50 is a light source that emits visible light of P-polarized light, and is a light emitting diode, a laser, or the like. The light source 50 may include an optical component such as a polarizer or a lens for converting S-polarized light into P-polarized light. The light source 50 is constituted by three light sources of, for example, a red light source, a green light source, and a blue light source.

The first optical system 60 is constituted by, for example, a prism or a lens that synthesizes light emitted from a plurality of light sources. The image display element 70 is an element that generates an intermediate image, and is, for example, a liquid crystal display element, an organic light emitting element, or the like. The second optical system 80 is constituted by, for example, a lens, a mirror, or the like. The concave mirror 90 is an optical member that reflects the intermediate image by a reflecting surface having a predetermined curvature, and is disposed at a position closest to the laminated glass 10 among optical members disposed on an optical path between the light source 50 and the laminated glass 10.

In the HUD system 1, light emitted from the light source 50 reaches the image display element 70 via the first optical system 60, and an intermediate image is formed at the image display element 70. The intermediate image formed by the image display element 70 is magnified by the second optical system 80 and the concave mirror 90, and is irradiated onto the optical reflection layer 14 of the laminated glass 10. The intermediate image irradiated onto the optical reflection layer 14 is mainly reflected by the optical reflection layer 14 and guided to the viewpoint position I of the passenger, and the passenger sees the intermediate image in a virtual image V (HUD image) in front of the laminated glass 10. The passenger is, for example, a driver of the vehicle.

In fig. 1, θ is an incident angle when visible light of P-polarized light emitted from the light source 50 enters the optical reflection layer 14 via a predetermined optical system. The incident angle θ may be 57deg (brewster angle), and may be greater than 57deg, or may be less than 57deg.

The HUD system 1 may have any other structure as long as it has at least the laminated glass 10 and the light source 50. The HUD system 1 may be, for example, a laser scanning system in which a laser beam is scanned by an optical scanning unit made of MEMS (Micro Electro MECHANICAL SYSTEMS: micro Electro mechanical system) or the like.

While the HUD system having the light source emitting the visible light of P-polarized light is described above, the laminated glass of the present invention can be used for the HUD system having the light source emitting the visible light of S-polarized light. In this case, as the optical reflection layer 14, a layer having a high reflectance of S-polarized light components is used. Alternatively, the laminated glass of the present invention may be used in a HUD system having a light source that emits both P-polarized light and S-polarized light.

[ Laminated glass ]

Fig. 2 is a view illustrating a laminated glass of the first embodiment, fig. 2 (a) is a view schematically showing a case of the laminated glass recognized from the outside of the vehicle to the inside of the vehicle, and fig. 2 (b) is a partial sectional view taken along a line A-A of fig. 2 (a).

As shown in fig. 2, the laminated glass 10 is a laminated glass for a vehicle, which includes a first glass plate 11, a second glass plate 12, an interlayer 13, an optical reflection layer 14, a shielding layer 15, and a scattering portion 16. The laminated glass 10 can be applied to, for example, a windshield of a vehicle.

The first glass plate 11 and the second glass plate 12 are bonded via an intermediate film 13. The first glass plate 11 is disposed on a first side that becomes an inside of a vehicle when the laminated glass 10 is mounted on the vehicle, and the second glass plate 12 is disposed on a second side that becomes an outside of the vehicle when the laminated glass 10 is mounted on the vehicle.

The laminated glass 10 may be, for example, a multi-curved shape that curves in both the vertical direction and the horizontal direction when mounted on a vehicle. However, the multi-curved shape is not limited to a shape curved in the vertical direction and the horizontal direction when mounted on a vehicle, but includes a shape curved in any two or more directions different from each other. Or the laminated glass 10 may be a single bent shape that is bent only in the vertical direction or the horizontal direction when mounted on a vehicle. However, the single curved shape is not limited to a shape curved only in the vertical direction or the horizontal direction when mounted on a vehicle, but includes a shape curved only in any one direction.

The laminated glass 10 is preferably bent to protrude toward the vehicle outside. That is, the second glass plate 12 is preferably bent to protrude toward the opposite side of the intermediate film 13, and the first glass plate 11 is preferably bent to protrude toward the intermediate film 13.

The first glass plate 11 is an in-vehicle glass plate that becomes an in-vehicle side (first side) when the laminated glass 10 is mounted on a vehicle. The first glass plate 11 may be bent. The first glass plate 11 includes a fourth surface 11 ₄ located on the opposite side of the intermediate film 13 and a third surface 11 ₃ located on the intermediate film 13 side. The first glass plate 11 has an upper side, a lower side, and two side edges connecting the upper side and the lower side.

The second glass plate 12 is an outside glass plate that becomes an outside (second side) of the vehicle when the laminated glass 10 is mounted on the vehicle. The second glass sheet 12 may also be bent. The second glass plate 12 has a second face 12 ₂ on the side of the intermediate film 13 and a first face 12 ₁ on the opposite side of the intermediate film 13. The second glass plate 12 has an upper side, a lower side, and two side edges connecting the upper side and the lower side in a plan view, as in the first glass plate 11.

In the case where the laminated glass 10 has a curved shape, the minimum value of the radius of curvature is preferably 500mm or more and 100000mm or less. The radii of curvature of the first glass plate 11 and the second glass plate 12 may be the same or different. In the case where the radii of curvature of the first glass plate 11 and the second glass plate 12 are different, it is preferable that the radius of curvature of the first glass plate 11 is smaller than the radius of curvature of the second glass plate 12. The radius of curvature of the portion where the scattering portion 16 is located may be as described above.

The first glass plate 11 and the second glass plate 12 are a pair of glass plates opposed to each other, and the interlayer 13 is located between the pair of glass plates. The first glass plate 11 and the second glass plate 12 are fixed in a state of sandwiching the intermediate film 13. The intermediate film 13 is a film that bonds the first glass plate 11 and the second glass plate 12.

The outer peripheral side surface of the intermediate film 13 is preferably edge-treated. That is, the outer peripheral side surfaces of the intermediate film 13 are preferably treated so as not to protrude significantly from the outer peripheral side surfaces of the first glass plate 11 and the second glass plate 12. The amount of protrusion of the outer peripheral side surfaces of the intermediate film 13 from the outer peripheral side surfaces of the first glass plate 11 and the second glass plate 12 is 150 μm or less, which is preferable from the viewpoint of not impairing the appearance. The first glass plate 11, the second glass plate 12, and the intermediate film 13 will be described in detail later.

The optical reflection layer 14 is a layer that reflects light incident from the first glass plate 11 side. The optically reflective layer 14 is transparent to visible light. In the example of fig. 2, the optically reflective layer 14 is disposed on the fourth face 11 ₄ of the first glass plate 11.

In the case of a HUD system using P polarized light, the optical reflective layer 14 is a P polarized light reflective layer. The P-polarized light reflective layer preferably has a visible ray reflectance of 10% or more and 30% or less at the time of incidence of the visible ray of the P-polarized light at an incidence angle of 57 deg. When the visible light reflectance is 10% or more, the visibility of the HUD image can be improved. When the visible light reflectance is 30% or less, reflection of objects disposed around the object can be reduced. In order to reduce reflection of objects disposed on the periphery and to realize a suitable HUD system, the visible light reflectance of the optical reflection layer 14 at an incident angle of 57deg is preferably 12% or more and 28% or less, more preferably 15% or more and 26% or less.

The visible ray reflectance of the P-polarized light reflective layer was calculated by measuring the spectral reflectance described in ISO9050:2003 with P-polarized light having a visible wavelength at an incident angle θ of 57deg as incident light, and based on the calculated visible ray reflectance described in ISO 9050:2003.

Examples of the P-polarized light reflective layer include a birefringent interference type polarizing plate composed of a polymer multilayer film containing 2 or more kinds of polymers having different refractive indexes, a polarizing plate having a fine uneven structure called a wire grid type, and a film containing a polarizing plate composed of a cholesteric liquid crystal layer. In the case of using a P-polarized light reflective film as the P-polarized light reflective layer, the thickness of the P-polarized light reflective film is preferably 25 μm or more and 200 μm or less. The thickness of the P-polarized light reflective film is more preferably 150 μm or less, and still more preferably 100 μm or less.

The use of a P-polarized light reflective coating layer as the P-polarized light reflective layer is preferable in terms of excellent visibility at low luminance such as at night or at a wider viewing angle than the case of using a P-polarized light reflective film. The use of a P-polarized light reflective coating is preferable in terms of easy control of film thickness and easy smoothing of the reflective surface to make the HUD image less deformable.

When the P-polarized light reflective coating is used as the P-polarized light reflective layer, the film thickness of the P-polarized light reflective coating is, for example, 50nm to 500 nm. The P-polarized light reflective coating layer can be formed on the surface of the glass plate by, for example, sputtering, CVD, or the like.

Examples of the P-polarized light reflective coating include an infrared reflection layer, a Low-e film made of a transparent conductive film such as ITO, and the like, which are exemplified by a film having a laminated structure of a high refractive index film and a Low refractive index film, and a laminated structure of a metal film such as silver and a dielectric film. Among them, a film having a laminated structure of a high refractive index film/a low refractive index film is preferable in view of being capable of maintaining the P-polarized light reflectivity at a high level. In the case where the high refractive index film/low refractive index film has a 2-layer structure, for example, the high refractive index film and the low refractive index film are laminated in this order on the fourth surface 11 ₄ of the first glass plate 11. In the case where the high refractive index film/low refractive index film has a 3-layer structure or more, the high refractive index film and the low refractive index film are alternately laminated in an arbitrary order on the fourth surface 11 ₄ of the first glass plate 11.

The refractive index of the high refractive index film is 1.8 or more, or 1.9 or more, or 2.0 or more, or 2.1 or more, preferably 2.5 or less at a wavelength of 550 nm. The refractive index of the low refractive index film is typically less than 1.8, or 1.7 or less, or 1.6 or less, preferably 1.2 or more at a wavelength of 550 nm.

Specifically, the high refractive index film preferably contains at least one of the following. Oxides of Zr, nb, sn, mixed oxides of Ti, zr, nb, si, sb, sn, zn, in, nitrides of Si, zr, mixed nitrides of Si, zr. In addition, the low refractive index film preferably contains at least one of silicon oxide, silicon oxynitride, silicon oxycarbide, or a mixture. Examples of the "mixture" may include a mixed oxide of silicon and aluminum and a mixed oxide of silicon and zirconium.

The first layer of the high refractive index film is optionally composed of one or more sublayers. The thickness (geometric film thickness) of the first layer of the high refractive index film is preferably 50nm or more and 100nm or less, particularly preferably 60nm or more and 80nm or less. The first layer of the low refractive index film is optionally composed of one or more sublayers. The thickness (geometric film thickness) of the first layer of the low refractive index film is preferably 70nm to 160nm, particularly preferably 100nm to 140 nm.

In the case of a HUD system using S polarized light, the optical reflection layer 14 is an S polarized light reflection layer. The reflectance of the S-polarized light reflective layer is preferably 18% or more and 30% or less at the time of incidence of the S-polarized light visible light at an incidence angle of 57 deg. When the visible light reflectance is 18% or more, the visibility of the HUD image can be improved. When the visible light reflectance is 30% or less, reflection of objects disposed around the object can be reduced. In order to reduce reflection of objects disposed on the periphery and to realize a suitable HUD system, the visible light reflectance of the optical reflection layer 14 at an incident angle of 57deg is preferably 12% or more and 28% or less, more preferably 15% or more and 26% or less.

The reflectance of the S-polarized light reflecting layer for visible light was calculated by measuring the spectral reflectance described in ISO9050:2003 with the S-polarized light having a visible wavelength at an incident angle θ of 57deg as incident light, and based on the calculated reflectance of visible light described in ISO 9050:2003. Examples of the S-polarized light reflective layer include an optical interference film formed by alternately stacking a high refractive index material such as TiO ₂ and a low refractive index material such as SiO ₂. The film may be a film in which the S-polarized light reflective layer is adhered to a glass plate with an adhesive layer.

The optically reflective layer 14 may be a layer transparent to visible light having a holographic function.

In the case of a HUD system having a light source that emits both P-polarized light and S-polarized light, the optical reflective layer 14 is a P-polarized light reflective layer. In this case, the visible ray reflectance of the P-polarized light reflecting layer at the incidence angle of 57deg and the incidence of the visible ray of the P-polarized light is preferably 10% or more and 30% or less, and the visible ray reflectance at the incidence angle of 57deg and the incidence of the visible ray of the S-polarized light is preferably 18% or more and 30% or less. For the reasons described above.

The shielding layer 15 is disposed closer to the second glass plate 12 than the optical reflection layer 14 in a cross-sectional view, and at least a part thereof overlaps the optical reflection layer 14 in a plan view. In the example of fig. 2, the shielding layer 15 is disposed on the second face 12 ₂ of the second glass sheet 12. The masking layer 15 is an opaque layer.

The shielding layer 15 may be provided at a part or the whole of the lower peripheral edge of the laminated glass 10 in a plan view, for example. The shielding layer 15 may be provided on the side peripheral edge portion and the upper peripheral edge portion in addition to the lower peripheral edge portion of the laminated glass 10 in a plan view. In the example of fig. 2, the shielding layer 15 is provided in a band shape in a top view on the lower peripheral edge portion, the side peripheral edge portion, and the upper peripheral edge portion of the laminated glass 10.

The width of the shielding layer 15 in a plan view can be appropriately set. The width of the shielding layer 15 in a plan view is, for example, about 10mm to 350mm, preferably 20mm to 300mm, more preferably 30mm to 280mm, excluding an information transmission/reception region 19 described later. In the case where the shielding layer 15 is provided on the side peripheral edge portion and the upper peripheral edge portion in addition to the lower peripheral edge portion, the width of the lower peripheral edge portion may be wider than the widths of the side peripheral edge portion and the upper peripheral edge portion.

The shielding layer 15 is, for example, an opaque colored ceramic layer, and its color is arbitrary, but is preferably a dark color such as black, brown, gray, or dark navy, and more preferably black. The shielding layer 15 can be formed by, for example, applying a ceramic paste containing a meltable frit containing a black pigment onto a glass plate by screen printing or the like and firing the paste, but is not limited thereto. The shielding layer 15 may be formed by, for example, applying an organic ink containing a black or dark pigment onto a glass plate by screen printing or the like and drying the same.

The presence of the opaque shielding layer 15 on the laminated glass 10 can suppress deterioration of the adhesive for holding the bracket for fixing the information transmitting/receiving device on the laminated glass 10 and the adhesive made of resin such as polyurethane for holding the peripheral edge portion of the laminated glass 10 on the vehicle body due to ultraviolet rays, and the adhesive portion is not visible from the inside and outside of the vehicle, so that the appearance is good.

The scattering portion 16 is a portion that scatters incident light, and is located at a position overlapping with a region where the optical reflection layer 14 is disposed in a plan view. That is, the scattering portion 16 is located at a position where light emitted from the light source 50 of the HUD system 1 can be irradiated. The scattering portion 16 is located in an opening 15x provided in the shielding layer 15 in a plan view. Therefore, the scattering portion 16 can be seen from the first glass plate 11 side, and can also be seen from the second glass plate 12 side.

The scattering portion 16 includes characters, figures, and/or symbols, and is a mark that can be recognized by human vision. The scattering portion 16 is, for example, a mark showing that the safety standard is satisfied. The scattering unit 16 may be a mark for displaying a manufacturer code, a product number, a date of manufacture, or the like. The diffuser 16 may also be a marker for advertising.

Even if the light emitted from the light source 50 of the HUD system 1 is not irradiated, but only sunlight or the like is irradiated, the scattering portion 16 can be seen from the first glass plate 11 side and the second glass plate 12 side. However, when the light emitted from the light source 50 of the HUD system 1 irradiates the scattering portion 16, the light is scattered by the scattering portion 16, and therefore the mark can be seen in a more beautiful state. That is, the appearance of the mark can be improved. By using the light source 50 of the HUD system 1, no other light source is required, and thus, it is also effective for the expansion of the space in the vehicle and the reduction of the cost. For example, by changing the color of the light irradiated from the light source 50 to the scattering portion 16, marks of various colors can be displayed. Further, since the scattering portion 16 is located in the opening portion 15x provided in the shielding layer 15 in a plan view, the line of sight is guided, and the mark is easily seen. In the case of viewing the mark from the outside of the vehicle, it is preferable in view of less reflection of P-polarized light from the glass as the light emitted from the light source 50.

The scattering portion 16 can be formed by etching the surface of the glass by, for example, a sand blast method in which particles are sprayed onto the surface of the glass. In the example of fig. 2, the optical reflection layer 14 and the fourth surface 11 ₄ of the first glass plate 11 are etched by a sand blast method to form a mark which is "M" of the scattering portion 16. The scattering portion 16 may be formed by a method other than etching the glass surface.

In the example of fig. 2, the scattering portion 16 is surrounded by the optically reflective layer 14 in a plan view. That is, an opening having the same shape as the scattering portion 16 is formed in the optical reflection layer 14, and the scattering portion 16 is located in the opening. The scattering portion 16 is located at a position overlapping with the region where the optical reflection layer 14 is arranged in a plan view, but does not overlap with the optical reflection layer 14 itself.

The method of forming the scattering portion 16 is not limited to the blasting method, and for example, a method of forming irregularities by dissolving a surface portion of glass with a chemical such as hydrofluoric acid may be used.

The surface roughness Ra of the scattering portion 16 is larger than the surface roughness Ra of the fourth surface 11 ₄ of the first glass plate 11. The fourth face 11 ₄ of the first glass sheet 11 is smooth. The surface roughness Ra of the scattering portion 16 is preferably 1 μm or more and 100 μm or less. The scattering portion 16 is easily visible as a mark when the surface roughness Ra is 1 μm or more. The scattering portion 16 maintains the strength of the first glass plate 11 when the surface roughness Ra is 100 μm or less, and the problem that the light emitted from the light source 50 shines on the scattering portion 16 is less likely to occur. The surface roughness Ra is more preferably 3 μm or more and 80 μm or less, and still more preferably 5 μm or more and 60 μm or less. The surface roughness Ra refers to an arithmetic average roughness specified in JIS B0601 (2013).

The haze value of the scattering portion 16 is larger than that of the first glass plate 11. The haze value of the first glass plate 11 is almost zero. The haze value of the scattering portion 16 is preferably 40% or more. The haze value of the scattering portion 16 is 40% or more, and is easily visible as a mark. In contrast, a haze value of the scattering portion 16 of 90% or less is preferable from the viewpoint of glass strength, and the problem that the light emitted from the light source 50 shines on the scattering portion 16 is less likely to occur. The haze value is more preferably 50% or more and 90% or less, and still more preferably 60% or more and 80% or less. The haze value can be measured by using a halogen lamp C light source according to JIS K7136:2000.

Fig. 3 is a partially enlarged plan view of the scattering portion and its vicinity shown in fig. 2 (a). The distance L between the scattering portion 16 and the opening 15x is preferably 5mm or more in a plan view. When the distance L is 5mm or more, the scattering portion 16 is not easily covered with the background shielding layer 15, and is easily seen from the oblique direction or from the outside of the vehicle. The distance L is preferably 20mm or less in terms of optical deformation. The distance L is more preferably 5mm to 20mm, still more preferably 6mm to 18mm, still more preferably 6mm to 17mm, still more preferably 7mm to 15 mm.

The laminated glass 10 may have an information transmitting and receiving area 19. The information transmitting/receiving area 19 is provided in the opening of the shielding layer 15 of the laminated glass 10. The information transmitting/receiving area 19 is provided at the upper peripheral edge of the laminated glass 10, for example. The information transmitting/receiving area 19 is an area for transmitting and/or receiving information, for example, an information device for processing visible Light such as a visible Light camera or an illuminance sensor, an information device for processing infrared Light such as a Light Detection and ranging system (Light Detection AND RANGING). That is, when the laminated glass 10 is mounted on a vehicle, an information device may be disposed inside the information transmission/reception area 19. In order to realize high optical quality and to enable good information transmission and reception, the optical reflection layer 14 is not provided in the information transmission and reception area 19.

A HUD display region R used in a head-up display is defined on a part of the laminated glass 10. The HUD display region R is a part of a region capable of inputting light emitted from a light source of the HUD system, and reflects a projection image from inside the vehicle to display information. The HUD display region R is a part of a range in which light emitted from the light source 50 is irradiated onto the laminated glass 10 when the HUD display position is moved in the SAE J1757-2 (2018) -based visual field. The position where the scattering portion 16 is formed is also a part of the range where the light emitted from the light source 50 irradiates the laminated glass 10.

The HUD display region R may be arranged in a region where the optical reflection layer 14 and the shielding layer 15 overlap in a plan view. The HUD display region R may be arranged so as to be divided into a plurality of portions in a region where the optical reflection layer 14 and the shielding layer 15 overlap each other in a plan view. In addition, another HUD display region different from the HUD display region R may be arranged at a position not overlapping the shielding layer 15 in a plan view.

In this way, in the laminated glass 10, the region where the optical reflection layer 14 and the shielding layer 15 overlap in a plan view defines the HUD display region R. By disposing the opaque shielding layer 15 at a position to be the background of the HUD display region R, it is possible to obtain a good contrast, to improve the visibility of the HUD image, and to make the scattering portion 16 conspicuous and to have a good appearance by the light of the light source of the HUD system. The black color of the shielding layer 15 is preferable from the viewpoint of visibility of the HUD image.

The first glass plate 11, the second glass plate 12, and the interlayer 13 will be described in detail below.

[ Glass plate ]

The first glass plate 11 and the second glass plate 12 may be inorganic glass or organic glass. As the inorganic glass, for example, soda lime glass, aluminum silicate glass, borosilicate glass, alkali-free glass, quartz glass, or the like can be used without particular limitation. The second glass plate 12 positioned outside the laminated glass 10 is preferably an inorganic glass from the viewpoint of scratch resistance, and is preferably a soda lime glass from the viewpoint of formability. When the first glass plate 11 and the second glass plate 12 are soda lime glass, transparent glass, green glass containing a predetermined amount or more of iron component, and dark green glass can be preferably used. Further, glass that absorbs ultraviolet rays or infrared rays may be used, and it is more preferable to be transparent, but a glass plate colored to such an extent that transparency is not impaired may also be used. In addition, the second glass plate 12 is borosilicate glass, which can improve the strength of the laminated glass 10 against flying stones.

The inorganic glass may be any of unreinforced glass and tempered glass. The unreinforced glass is a glass obtained by forming molten glass into a flat plate shape and slowly cooling the glass. The tempered glass is a glass in which a compressive stress layer is formed on the surface of unreinforced glass. In addition, in the case of the tempered glass, by isotropically distributing the stress, the residual stress can be reduced.

The tempered glass may be any of physically tempered glass such as air-cooled tempered glass and chemically tempered glass. In the case of physically strengthening glass, for example, a glass sheet heated uniformly during bending is quenched from a temperature near the softening point or the like to cause a temperature difference between the glass surface and the inside of the glass to generate a compressive stress layer on the glass surface, thereby strengthening the glass surface.

In the case of chemically strengthened glass, for example, after bending, the glass surface can be strengthened by applying compressive stress to the glass surface by an ion exchange method or the like.

On the other hand, examples of the material of the organic glass include polycarbonate, acrylic resin such as polymethyl methacrylate, and transparent resin such as polyvinyl chloride and polystyrene.

The first glass plate 11 and the second glass plate 12 are not limited to a trapezoid or a rectangle, and may be a shape processed into various shapes and curvatures. The bending of the first glass plate 11 and the second glass plate 12 may be performed by gravity molding, press molding, roll molding, or the like. The method for forming the first glass plate 11 and the second glass plate 12 is not particularly limited, and for example, in the case of inorganic glass, a glass plate formed by float method or the like is preferable.

The thickness of the second glass plate 12 is preferably 1.1mm or more and 3mm or less at the thinnest portion. The second glass plate 12 has a plate thickness of 1.1mm or more, and has sufficient strength such as flystone resistance, and 3mm or less, the quality of the laminated glass 10 is preferably not excessively high in view of fuel consumption of a vehicle. The thickness of the second glass sheet 12 is more preferably 1.8mm or more and 2.8mm or less, still more preferably 1.8mm or more and 2.6mm or less, still more preferably 1.8mm or more and 2.2mm or less, still more preferably 1.8mm or more and 2.1mm or less, at the thinnest portion.

The thickness of the first glass plate 11 is preferably 0.3mm or more and 2.3mm or less. The first glass plate 11 has good handleability when the plate thickness is 0.3mm or more, and has a mass that does not become excessive when the plate thickness is 2.3mm or less.

In addition, when the thickness of the first glass plate 11 is not suitable, if the first glass plate 11 and the second glass plate 12 are formed into 2 pieces of glass which are bent particularly deeply, there is a mismatch in the shape of 2 pieces, and the quality of the glass such as residual stress after press bonding is greatly affected.

However, by setting the plate thickness of the first glass plate 11 to 0.3mm or more and 2.3mm or less, glass quality such as residual stress can be maintained. The first glass plate 11 has a plate thickness of 0.3mm or more and 2.3mm or less, which is particularly effective in maintaining the glass quality of the glass having a deep bending. The thickness of the first glass plate 11 is more preferably 0.5mm or more and 2.2mm or less, and still more preferably 0.7mm or more and 2.1mm or less. Within this range, the above effects are more remarkable. The thickness of the first glass plate 11 is more preferably 1.0mm or more, still more preferably 1.3mm or more, still more preferably 1.5mm or more. The thickness of the first glass plate 11 is more preferably 2.0mm or less, and still more preferably 1.9mm or less.

The first glass plate 11 and/or the second glass plate 12 may have a plate thickness that is not constant, but may be changed at various positions as needed. For example, when the laminated glass 10 is a windshield, one or both of the first glass plate 11 and the second glass plate 12 may have a wedge-shaped cross section in which the thickness of the sheet becomes thicker from the lower side toward the upper side of the windshield in a state where the windshield is mounted on a vehicle. In this case, if the film thickness of the intermediate film 13 is constant, the total wedge angle of the first glass plate 11 and the second glass plate 12 varies, for example, in a range of more than 0mrad and 1.0mrad or less.

A film having a waterproof, ultraviolet or infrared cut-off function or a film having low reflection characteristics, low radiation characteristics may be provided on the outer side of the first glass plate 11 and/or the second glass plate 12. In addition, a film having ultraviolet or infrared cut-off, low radiation characteristics, visible light absorption, coloring, and the like may be provided on the side of the first glass plate 11 and/or the second glass plate 12 that is in contact with the intermediate film 13.

In the case where the first glass plate 11 and the second glass plate 12 are inorganic glass having a curved shape, the first glass plate 11 and the second glass plate 12 are curved and formed after being formed by a float method or the like and before being bonded via the interlayer 13. The bending is performed by softening the glass by heating. The heating temperature of the glass during bending can be controlled in the range of about 550 ℃ to 700 ℃.

[ Intermediate film ]

The intermediate film 13 is usually formed of a thermoplastic resin, and examples thereof include thermoplastic resins conventionally used for such applications, such as a thermoplastic polyvinyl acetal resin, a plasticized polyvinyl chloride resin, a saturated polyester resin, a plasticized saturated polyester resin, a polyurethane resin, a plasticized polyurethane resin, an ethylene-vinyl acetate copolymer resin, an ethylene-ethyl acrylate copolymer resin, a cycloolefin polymer resin, and an ionomer resin. In addition, a resin composition containing a modified block copolymer hydride described in Japanese patent No. 6065221 may be preferably used.

Among them, plasticized polyvinyl acetal resins are preferably used because of excellent balance of various properties such as transparency, weather resistance, strength, adhesion, penetration resistance, impact energy absorption, moisture resistance, heat insulation and sound insulation. These thermoplastic resins may be used singly or in combination of 2 or more. The term "plasticizing" in the plasticized polyvinyl acetal resin means plasticizing by adding a plasticizer. The same meaning is also indicated for other plasticizing resins.

However, when a specific object is sealed in the intermediate film 13, the sealed object may be degraded by a specific plasticizer depending on the type of the sealed object. In this case, a resin substantially free of the plasticizer is preferably used. Examples of the plasticizer-free resin include ethylene-vinyl acetate copolymer (EVA) resins.

Examples of the polyvinyl acetal resin include a polyvinyl formal resin obtained by reacting polyvinyl alcohol (PVA) with formaldehyde, a polyvinyl acetal resin in a narrow sense obtained by reacting PVA with acetaldehyde, and a polyvinyl butyral resin (PVB) obtained by reacting PVA with n-butyraldehyde, and PVB is suitable from the viewpoint of excellent balance of properties such as transparency, weather resistance, strength, adhesion, penetration resistance, impact energy absorption, moisture resistance, heat insulation, and sound insulation. These polyvinyl acetal resins may be used alone or in combination of 2 or more kinds.

The material forming the intermediate film 13 is not limited to thermoplastic resin. The intermediate film 13 may contain functional particles such as an infrared absorber, an ultraviolet absorber, and a luminescent agent. The intermediate film 13 may have a colored portion called a light shielding tape. The coloring pigment used for forming the colored portion may be any one as long as it can be used as a plastic and the amount of the coloring pigment added is adjusted so that the visible light transmittance of the colored portion is 40% or less, and examples thereof include organic coloring pigments such as azo pigments, phthalocyanine pigments, quinacridone pigments, perylene pigments, pyrenone pigments, dioxazine pigments, anthraquinone pigments, isoindolinone pigments, and inorganic coloring pigments such as oxides, hydroxides, sulfides, chromic acid, sulfate, carbonate, silicate, phosphate, arsenate, ferrocyanide pigments, carbon pigments, and metal powders. These coloring pigments may be used alone or in combination of 2 or more. The portion of the intermediate film 13 overlapping the scattering portion 16 in a plan view may be colored to improve the appearance of the mark.

The intermediate film 13 may have a plurality of layers. For example, the intermediate film 13 may have 3 or more layers. For example, when the interlayer is formed of 3 or more layers and the shear elastic modulus of the layers other than the two layers is made smaller than the shear elastic modulus of the two layers by adjustment of the plasticizer or the like, the sound insulation of the laminated glass 10 can be improved. In this case, the shear elastic modulus of the two side layers may be the same or different.

The thickness of the intermediate film 13 is preferably 0.5mm or more at the thinnest portion. In the case where the intermediate film 13 has a plurality of layers, the film thickness of the intermediate film 13 is the total film thickness of the respective layers. The thickness of the interlayer 13 at the thinnest portion is 0.5mm or more, and the impact resistance required for laminated glass is sufficient. The thickness of the intermediate film 13 is preferably 2mm or less at the thickest part. The maximum value of the film thickness of the interlayer 13 is 2mm or less, so that the quality of the laminated glass does not become excessively large. The maximum value of the film thickness of the intermediate film 13 is more preferably 1.5mm or less, and still more preferably 1.2mm or less.

In the case where the intermediate film 13 has a plurality of layers, the layers included in the intermediate film 13 are preferably formed of the same material, but may be formed of different materials. However, from the viewpoints of adhesion to the first glass plate 11 and the second glass plate 12, functional materials incorporated into the laminated glass 10, and the like, it is preferable to use the above materials for the interlayer 13 at a portion of 50% or more of the film thickness.

The intermediate film 13 is not constant in film thickness, and the film thickness may be changed at each position as needed. For example, in the case where the laminated glass 10 is a windshield, the interlayer 13 may have a wedge-shaped cross section in which the thickness of the interlayer becomes thicker from the lower side toward the upper side of the front windshield in a state where the windshield is mounted on a vehicle. In this case, if the thicknesses of the first glass plate 11 and the second glass plate 12 are constant, the wedge angle of the intermediate film 13 may be, for example, in a range of more than 0mrad and 1.0mrad or less, and may be 0.1mrad or more and 0.7mrad or less, and 0.2mrad or more and 0.5mrad or less. The portion of the intermediate film 13 overlapping the scattering portion 16 in a plan view may be tapered in cross section.

For example, the intermediate film 13 is produced by appropriately selecting the above resin material forming the intermediate film and extrusion-molding the resin material in a heated and melted state using an extruder. Extrusion conditions such as extrusion speed of the extruder are set to be uniform. Then, the resin film obtained by extrusion molding is stretched as needed, for example, so that the upper and lower sides of the resin film have curvatures, to thereby complete the intermediate film 13, in accordance with the design of the laminated glass.

[ Laminated glass ]

The total thickness of the laminated glass 10 is preferably 2.8mm or more and 10mm or less. The laminated glass 10 can have a total thickness of 2.8mm or more, and can secure sufficient rigidity. When the total thickness of the laminated glass 10 is 10mm or less, a sufficient transmittance can be obtained and the haze can be reduced. The total thickness of the laminated glass 10 is preferably 7mm or less, more preferably 6mm or less, and still more preferably 5mm or less.

The plate deviation of the first glass plate 11 and the second glass plate 12 is preferably 1.5mm or less, more preferably 1mm or less, on at least one side of the laminated glass 10. Here, the plate deviation of the first glass plate 11 and the second glass plate 12 refers to the amount of deviation of the outer peripheral side surface of the first glass plate 11 from the outer peripheral side surface of the second glass plate 12 in a plan view.

On at least one side of the laminated glass 10, a plate deviation of 1.5mm or less of the first glass plate 11 and the second glass plate 12 is preferable from the viewpoint of not impairing the external appearance. On at least one side of the laminated glass 10, the first glass plate 11 and the second glass plate 12 are more preferably deviated by 1.0mm or less in order not to impair the appearance.

[ Method for producing laminated glass ]

The laminated glass 10 is produced by first preparing a first glass plate 11 having a third surface 11 ₃ and a fourth surface 11 ₄, an interlayer 13, and a second glass plate 12 having a first surface 12 ₁ and a second surface 12 ₂. The plate thicknesses of the first glass plate 11 and the second glass plate 12 are constant. The film thickness of the intermediate film 13 is also constant. Alternatively, the first glass plate 11 or the second glass plate 12 having a wedge-shaped cross section, or the intermediate film 13 having a wedge-shaped cross section may be prepared.

Next, the optical reflection layer 14 is provided on the fourth surface 11 ₄ of the first glass plate 11. For example, the optical reflection layer 14 is formed on the fourth surface 11 ₄ of the first glass plate 11 by sputtering, CVD, or the like. The first glass plate 11 on which the optical reflection layer 14 is formed may be prepared by forming the optical reflection layer 14 on a large-sized glass and then cutting the glass.

Then, the scattering portion 16 is formed. The scattering portion 16 may be formed by, for example, spraying particles from the optical reflection layer 14 side to etch the optical reflection layer 14 and the fourth surface 11 ₄ of the first glass plate 11.

Subsequently, a shielding layer 15 is formed on the second face 12 ₂ of the second glass plate 12. In the case where the shielding layer 15 is a colored ceramic layer, it can be formed by, for example, applying a ceramic paste on the second surface 12 ₂ of the second glass plate 12 by screen printing or the like and firing the paste.

After that, after the step of forming the optical reflection layer 14 and the shielding layer 15, the first glass plate 11 and the second glass plate 12 are subjected to bending molding. The bending of the first glass plate 11 and the second glass plate 12 may be performed by press molding, for example. Specifically, a concave-convex forming mold corresponding to the final shape of the laminated glass 10 is prepared, the first glass plate 11 and the second glass plate 12 are heated to a predetermined temperature to be softened, and then the first glass plate 11 and the second glass plate 12 are bent by press working with the forming mold. The bending of the first glass plate 11 and the second glass plate 12 may be performed by gravity molding, roll molding, or the like. In the case where the optical reflection layer 14 is a film, after the first glass plate 11 and the second glass plate 12 are bent, the first and second glass plates may be laminated together in a step of forming a laminated body by sandwiching the intermediate film 13, or may be adhered to the glass surface after the laminated glass 10 is formed.

In the laminated glass 10, the difference in the thickness between the first glass plate 11 and the second glass plate 12 is preferably 0.3mm or less, more preferably 0.2mm or less. It is particularly preferable that the first glass plate 11 and the second glass plate 12 have the same plate thickness. The smaller the difference between the plate thicknesses of the first glass plate 11 and the second glass plate 12, the closer the behavior during bending, so that the perspective distortion can be reduced.

Next, the intermediate film 13 is stretched as needed. Then, an interlayer 13 is disposed between the third surface 11 ₃ of the first glass plate 11 and the second surface 12 ₂ of the second glass plate 12, and pressure bonding is performed. For example, the intermediate film 13 is sandwiched between the first glass plate 11 and the second glass plate 12 so that the optical reflection layer 14 is positioned outside, and a laminate is formed. Then, for example, the laminate is placed in a rubber bag, a rubber chamber, a resin bag, or the like, and bonded under vacuum conditions in which the temperature is controlled to be in the range of about 70 ℃ to 110 ℃ in a vacuum range of-100 kPa to-65 kPa. The heating conditions, temperature conditions and lamination method are appropriately selected.

Further, for example, by performing the pressure bonding treatment under heating and pressing under conditions in which the temperature is 100 ℃ to 150 ℃ and the absolute pressure is 0.6mpa to 1.5mpa, a laminated glass 10 having more excellent durability can be obtained. However, in some cases, the heating and pressurizing step may not be used in consideration of simplification of the steps and characteristics of the material enclosed in the laminated glass 10. Through the above steps, the laminated glass 10 is produced.

In addition, a so-called "cold bending method" may be used, in which the second glass plate 12 is bent in advance, and the first glass plate 11, which is flat with the interlayer film 13 interposed therebetween, is bent along the shape of the second glass plate 12 and bonded to form the laminated glass 10.

The first glass plate 11 and the second glass plate 12 may be provided with a film or a device having functions such as heating wire, infrared reflection, light emission, power generation, light adjustment, touch panel, visible light reflection, scattering, decoration, and absorption, in addition to the intermediate film 13, within a range that does not impair the effects of the present application. The surface of the laminated glass 10 may be provided with a film having functions such as antifogging, water repellency, heat insulation, and low reflection. The inner main surface of the first glass plate 11 or the inner main surface of the second glass plate 12 may be provided with a film having functions such as heat insulation and heat generation.

Modified example

Fig. 4 is a cross-sectional view illustrating a laminated glass according to modification 1 of the first embodiment. The laminated glass 10A shown in fig. 4 is different from the laminated glass 10 in that the scattering portion 16 is located on the first surface 12 ₁ of the second glass plate 12.

The scattering portion 16 overlaps the optical reflection layer 14 in a plan view. The scattering portion 16 is located in an opening 15x provided in the shielding layer 15 in a plan view. The light emitted from the light source 50 and transmitted through the optical reflection layer 14 passes through the inside of the opening 15x and irradiates the scattering portion 16. The scattering portion 16 may be formed by, for example, a sand blast method in which particles are sprayed onto the first surface 12 ₁ of the second glass plate 12. At this time, since the optical reflection layer 14 does not need to be etched, the scattering portion 16 can be formed without damaging the optical reflection layer 14.

The scattering portion 16 is located on the first surface 12 ₁ of the second glass plate 12, and exhibits the same effects as those of the first embodiment.

Fig. 5 is a cross-sectional view illustrating a laminated glass according to modification 2 of the first embodiment. The laminated glass 10B shown in fig. 5 is different from the laminated glass 10 in that the scattering portions are located on the first surface 12 ₁ of the second glass plate 12 and the fourth surface 11 ₄ of the first glass plate 11. Specifically, the diffuser 16 ₁ is located on the first face 12 ₁ of the second glass sheet 12, and the diffuser 16 ₂ is located on the fourth face 11 ₄ of the first glass sheet 11.

The scattering portions 16 ₁ and 16 ₂ overlap the shielding layer 15 in a plan view. This improves contrast, and therefore, the scattering portions 16 ₁ and 16 ₂ are easily visible. The light emitted from the light source 50 irradiates the scattering portion 16 ₂, but does not irradiate the scattering portion 16 ₁ due to the presence of the shielding layer 15. The diffuser portion 16 ₁ is visible from outside the vehicle and the diffuser portion 162 is visible from inside the vehicle. The scattering portions 16 ₁ and 16 ₂ may be the same marks or different marks.

Fig. 6 is a cross-sectional view illustrating a laminated glass according to modification 3 of the first embodiment. The laminated glass 10C shown in fig. 6 is different from the laminated glass 10 in that the scattering portion 16 is located on the second surface 12 ₂ of the second glass plate 12.

The scattering portion 16 overlaps the optical reflection layer 14 in a plan view. The scattering portion 16 is located in an opening 15x provided in the shielding layer 15 in a plan view. The light emitted from the light source 50 and transmitted through the optical reflection layer 14 is irradiated to the scattering portion 16. The scattering portion 16 is sealed with, for example, a resin film 17 and is adhered to the second surface 12 ₂ of the second glass plate 12. The diffuser 16 may be attached to the third surface 11 ₃ of the first glass plate 11.

The scattering portion 16 may be formed by a sand blast method, but since the irregularities formed by the sand blast method are buried in the resin constituting the intermediate film 13, there is a concern that visibility is lowered. By sealing the scattering portion 16 with the resin film 17, the irregularities constituting the scattering portion 16 cannot be buried by the resin constituting the intermediate film 13, and thus good visibility can be obtained. In addition, since the optical reflection layer 14 does not need to be etched, the scattering portion 16 can be formed without damaging the optical reflection layer 14. Further, the scattering portion 16 may be coated on a resin film or coated on glass to be adhered to the second face 12 ₂ of the second glass plate 12 or the third face 11 ₃ of the first glass plate 11.

As a specific example of the structure of the scattering portion 16 sealed with the resin film 17, the following laminate may be mentioned. That is, the laminate is provided with a first transparent film, a first transparent layer provided on the first transparent film and having a concave-convex structure on the surface, a reflective film provided along the surface of the first transparent layer on the concave-convex structure side, a second transparent layer provided so as to cover the surface of the reflective film, and a second transparent film provided on the surface of the second transparent layer. In the laminate, the uneven structure functions as the scattering portion 16, and the remaining portion functions as the resin film 17. In this structure, the ranges of the surface roughness Ra and haze value are as described above.

In this way, the scattering portion 16 is positioned on the second surface 12 ₂ of the second glass plate 12 or the third surface 11 ₃ of the first glass plate 11, and the same effects as those of the first embodiment are exhibited.

The preferred embodiments and the like have been described in detail above, but the present invention is not limited to the above embodiments and the like, and various modifications and substitutions are applied to the above embodiments and the like without departing from the scope of the claims.

For example, in the above embodiments and modifications, the example in which the optical reflection layer 14 is provided on the fourth surface 11 ₄ of the first glass plate 11 has been described. However, the optical reflection layer 14 may be located at a position capable of reflecting light emitted from the light source of the HUD system. For example, the optical reflection layer 14 may be provided on the surface of the third surface 11 ₃ or the like of the first glass plate 11. In addition, the provision of the optical reflection layer 14 on the fourth surface 11 ₄ of the first glass plate 11 is advantageous in that ghost images can be reduced.

In addition to the above embodiments, the following additional notes are also disclosed.

[ Additional note 1]

A laminated glass comprising a first glass plate, a second glass plate, and an interlayer film interposed between the first glass plate and the second glass plate and adhering the first glass plate and the second glass plate, wherein the laminated glass comprises:

an optical reflection layer for reflecting light incident from the first glass plate side,

A shielding layer disposed closer to the second glass plate than the optical reflection layer in a cross-sectional view and at least partially overlapping the optical reflection layer in a plan view, and

And a scattering portion located at a position overlapping with the region where the optical reflection layer is disposed in a plan view.

[ Additionally noted 2]

The laminated glass according to the annex 1, wherein the surface roughness Ra of the scattering portion is 1 μm or more and 100 μm or less.

[ Additionally recorded 3]

The laminated glass according to any one of supplementary notes 1 to 2, wherein the haze value of the scattering portion is 40% or more.

[ Additional note 4]

The laminated glass according to any one of supplementary notes 1 to 3, wherein when the surface of the first glass plate on the side opposite to the interlayer film is a fourth surface, the surface of the first glass plate on the side of the interlayer film is a third surface, the surface of the second glass plate on the side of the interlayer film is a second surface, and the surface of the second glass plate on the side opposite to the interlayer film is a first surface,

The scattering portion is located on the first face or the fourth face,

The scattering portion is located in an opening portion provided in the shielding layer in a plan view.

[ Additional note 5]

The scattering portion is located on the second face or the third face,

[ Additional note 6]

The scattering portions are located on the first face and the fourth face,

Each of the scattering portions overlaps the shielding layer in a plan view.

[ Additionally noted 7]

The laminated glass according to any one of supplementary notes 1 to 3, wherein the scattering portion is sealed with a resin film, or is coated on a resin film or a glass and is adhered to the second surface or the third surface.

[ Additionally recorded 8]

The laminated glass according to any one of supplementary notes 4, 5, and 7, wherein a distance between the scattering portion and the opening portion is 5mm or more in a plan view.

[ Additional note 9]

The laminated glass according to any one of supplementary notes 1 to 8, wherein the scattering portion includes characters, figures and/or symbols, and is a mark that can be recognized by human vision.

[ Additional note 10]

The laminated glass according to any one of supplementary notes 1 to 9, wherein the optical reflection layer has a visible ray reflectance of 10% or more when the incident angle is 57deg and the visible ray of P-polarized light is incident.

[ Additional note 11]

The laminated glass according to any one of supplementary notes 1 to 10, wherein the optical reflection layer has a visible ray reflectance of 18% or more when the incident angle is 57deg and the visible ray of S-polarized light is incident.

[ Additional note 12]

The laminated glass according to any one of supplementary notes 1 to 11, wherein the optical reflection layer is disposed on a surface of the first glass plate on a side opposite to the intermediate film.

Symbol description

1HUD system

10,10A,10B,10C laminated glass

11 First glass plate

11 ₃ Third face

11 ₄ Fourth surface

12 Second glass pane

12 ₁ First side

12 ₂ Second face

13 Intermediate film

14 Optical reflection layer

15 Masking layer

15X opening part

16,161,162 Scattering portion

17 Resin film

19 Information receiving and transmitting area

50 Light source

60 First optical system

70 Image display element

80 Second optical system

90 Concave mirror.

Claims

1. A laminated glass comprising a first glass sheet, a second glass sheet, and an interlayer film positioned between the first glass sheet and the second glass sheet for bonding the first glass sheet and the second glass sheet together, wherein the laminated glass comprises:

an optical reflective layer that reflects light incident from the first glass plate side,

a shielding layer disposed closer to the second glass plate than the optical reflective layer in a cross-sectional view and at least partially overlapping the optical reflective layer in a plan view; and

The scattering portion is located at a position overlapping with the area where the optical reflective layer is arranged in a plan view.

2 . The laminated glass according to claim 1 , wherein the surface roughness Ra of the scattering portion is 1 μm or more and 100 μm or less.

The laminated glass according to claim 1 , wherein the haze value of the scattering portion is greater than 40%.

4. The laminated glass according to claim 1, wherein the surface of the first glass sheet on the side opposite to the interlayer film is defined as the fourth surface, the surface of the first glass sheet on the side of the interlayer film is defined as the third surface, the surface of the second glass sheet on the side of the interlayer film is defined as the second surface, and the surface of the second glass sheet on the side opposite to the interlayer film is defined as the first surface.

The scattering portion is located on the first surface or the fourth surface,

The scattering portion is located in the opening portion provided in the shielding layer in a plan view.

5. The laminated glass according to claim 1, wherein the surface of the first glass sheet on the side opposite to the interlayer film is defined as the fourth surface, the surface of the first glass sheet on the side of the interlayer film is defined as the third surface, the surface of the second glass sheet on the side of the interlayer film is defined as the second surface, and the surface of the second glass sheet on the side opposite to the interlayer film is defined as the first surface.

The scattering portion is located on the second surface or the third surface,

6. The laminated glass according to claim 1, wherein the surface of the first glass sheet on the side opposite to the interlayer film is defined as the fourth surface, the surface of the first glass sheet on the side of the interlayer film is defined as the third surface, the surface of the second glass sheet on the side of the interlayer film is defined as the second surface, and the surface of the second glass sheet on the side opposite to the interlayer film is defined as the first surface.

The scattering portion is located on the first surface and the fourth surface,

Each of the scattering portions overlaps with the shielding layer in a plan view.

7 . The laminated glass according to claim 5 , wherein the scattering portion is sealed with a resin film, or is coated on a resin film or on glass and bonded to the second surface or the third surface.

8 . The laminated glass according to claim 4 , 5 or 7 , wherein the distance between the scattering portion and the opening is greater than 5 mm in a plan view.

9 . The laminated glass according to claim 1 , wherein the scattering portion includes characters, graphics, and/or symbols, and is a mark recognizable by human vision.

10 . The laminated glass according to claim 1 , wherein the optical reflective layer has a visible light reflectivity of 10% or more when a P-polarized visible light ray is incident at an incident angle of 57 degrees.

The laminated glass according to any one of claims 1 to 7, wherein the optical reflective layer has a visible light reflectivity of 18% or more when an incident angle of 57 degrees is applied to S-polarized visible light.

12 . The laminated glass according to claim 1 , wherein the optical reflective layer is disposed on a surface of the first glass sheet that is located on the opposite side to the intermediate film.